I believe I have at least one of the Galazan trigger guards. I do not think they were made according to frame size though. I have a pile of TGs, some raw forgings some take offs. I do not think I have an O frame in the shop now but I do have an 00 frame in currently. I'll look later in the day to see if I can find something that will work for you.

Steve

http://www.bertramandco.com/
Booking African hunts, firearms import services

Here for the meltdowns